ADS1298: Extra amplifier

Rashid Nasimov

Prodigy 30 points

Part Number: ADS1298

Hi, Alexander.

Do we need add extra amplifier to ECG sensors signals before input them to ADS1298R.

As heart muscle signals in the range of 1-5mV, and input of the chip is 2,5 -5V

Or internal PGA will be sufficient

Why I skthis question, because I doubted after seeing block diagram below

Thanks in advance

over 6 years ago

0 Ryan Andrews over 6 years ago

TI__Guru 67486 points

Hello Rashid,

Thanks for your post.

This diagram is intended to illustrate generic best layout practices for printed circuit boards with mixed signal components. It's not meant to suggest that an amplifier is required in front of the ADS1298.

The gain of the PGA and the dynamic range offered in the ADS1298 should be more than enough for your application.

Best regards,

0 Rashid Nasimov over 6 years ago in reply to Ryan Andrews

Prodigy 30 points

Hello Ryan

Thank you for your quick response

It help me a lot!

Best Regards.

Data converters

Data converters forum

ADS1298: Extra amplifier